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-9- ') ~.... part by ,,'ater saved by concrete-lining a 49-mile r",ach of the Coachella C,;:l 00 Canal in southern California. The lining would save economically an o estimated 132,000 acre-feet of <vater annually, which would be temporarily available for use by the Federal Government until the amount borrowed from storage is paid back or the Secretary of the Interior reduces deliveries of mainstream Colorado River water to California to 4.4 million acre-feet annually. The second major commitment is that the highly saline reject stream from the desalting plant, containing the salts removed from the drain water, would be kept separate and conveyed by a drain directly to the international boundary, and thence through Mexico to the Santa Clara Slough on the Gulf of California. under the agreement the Government of Mexico would construct, operate, and maintain the part of the drain located in Mexico. The United States would assume the cost of building, operating, and maintaining that portion of the brine waste canal within Mexico, which must be concrete-lined to prevent the highly saline water from infiltrating into groundwaters of Mexico. . The third commitment undertaken by the United States is to support Mexican efforts to obtain appropriate financing on favorable terms for the improvement and rehabilitation of the Mexicali Valley where Mexico uses its Colorado River waters, and to provide on a mutually acceptable basis a grant for those aspects of the rehabilitation program in the Mexicali Valley directly related to salinity, including tile drainage. When a mutually acceptable basis has been arrived at, a report and recommendations .,ill be submitted to the Congress.